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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5288604f64c30d27b749a9f3765a5d74a1b23c9bd9a133f6dc3e4b30bef34434' 
  AND token = 'gO7gbaaQA1kzz8OtasLSBDDy0mLVTVb9PzZgn9p7opU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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