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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd93ac0252618d593b39ed3a96adbe1b261c770e86f0a8abf6774dec46a298914' 
  AND token = 'JTI/bCrVq0EUc7afflfmROu4UZYmJyG0NUdgS6+rOds=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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