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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8bbd888135d83ae33a614bcd0ce3a600a07ca2b1ec4c13fc06fab309ea46c4ed' 
  AND token = '9QAWP7WfCUfKbR/clNII3qgqv3/41Yj72Q1XtxVFXuA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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