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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ca9462220fa344c2709a1e739c6ec6ef94ac7ac4687788c1156c95b8bd630cea' 
  AND token = 'NgoYI5kF39zADWn1MQ7UkNc5YUKAWGKzmjH3tMf84b4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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