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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1bcab59413cb2d799e9e9999604550c97f61167694df720cb2e1d7fb6f6c7955' 
  AND token = 'i+SyYG5bqMIPPro1qGhhrz4rA4iYagFzwXtWk1HJ4Zc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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