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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9da325669221ee0f1b8ab8db6ad819b064abbc1b16cc4363b27cbddc20a7b07e' 
  AND token = 'PSXE725ErUWtgh3k4ifZQwLCfhjg1U0iaB+ah/FQEpU=' 
  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"
    }
  }
}