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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'da2087ec35163d4097331b869ecb2201cf3a26150d54903690b50cc51bc17184' 
  AND token = '/AauD30djFb+N5t10q7y1gU5J7HvmfNa2bTVtyD/+x4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}