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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '36337f6763110ffc97243fdd77a1f73c0aa3a3341a298724b68c2ed84bd70e83' 
  AND token = 'U/tGbeX8xV8g3o9IeMlslNJbv0/wKXd70+MUv3oue5w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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