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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd9a56bc8a572a1660a73f8fc7c7827d75be33fae0a92edfbaf657f7f636ff02d' 
  AND token = '7Dnws65EGKox00Ga97gi/6D3MB7alyKjpxHGeviRAnM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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