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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cee651252f4e8183832761b5e0dd31e5b9c0e610f11e08059aa2b8b36df8f765' 
  AND token = 'hAeOBhK1i3nHWmr9DNE9ZWjCBo5uA9UXQX7njl2ydr8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}