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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6cfb2acef64235a9b09ac71d9ca7eb089728793752b59b743e431475c3319cb1' 
  AND token = 'sEqRlg77nHhe7Qs9pCFK7l6JwB4U5frsPqEh3lQTkyg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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