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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba4624a80b24c7ae53e3a1b890d5ab4a63cec88db3d08cbab4fe6b74b18cf175' 
  AND token = 'MLLJtvxMk6ObijCHCzJmOdiHhFJpP2H5oMFhkqj2yG4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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