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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '10e390f71d338e7aff697d9bcac4a27c8f6ca29e7b602b288d50de5a86588a6d' 
  AND token = 'ty2aDlAzvWYhyyhp6agfeTuXAnLfW8z93wsa3m3rCeE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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