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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f11dd07e91c0790ffd24ec306d41121e402d1d4fb73babe0f20ef9f580bbaeac' 
  AND token = 'yOi8r2cdcg0k35f+9rH9fGQeO/hTkHVrUOGvJs5cXow=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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