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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '229b22e295ba97f014ba8a3c0776f77800b4391c5174d699507e428200c10729' 
  AND token = 'QomYKE1no2VPViGVbK8Yz/9W1vA3aqPJA3SIxuIsM7U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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