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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd92f1bf677ddbcbede16a34c972eb47d236b508cdfaf7c6accece3e8c62cf152' 
  AND token = '9fik3VlS1DDa+/tB7SQoY1HhHiHxgHcK1f94B58rnKs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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