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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '16d05be9f31bd3d0e12b7fbbebac6be81b766a5a757848edba2f99e3612873e5' 
  AND token = '+aBFwojU6KxDA+6g0yz4e8WOY83qcoplmioXYv8QEWc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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