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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '77d0a31d3e0a2227459c5c15a5ac0bc99d747fbc26e66e6f3edd02e6e7df5c1e' 
  AND token = 'abYLtinyqljY+KAnqP1CdAwsx5tg9ODOfZv8V6et348=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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