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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '032585c6a95b433a30f89b2ef595a4122f070ad47ab4f6af5500c3890276b4ad' 
  AND token = 'kvoR3krbFG8y3bi7s8ZonP1aCfhAOUr0s8CXFyOjTZ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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