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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2d35f5cf204791c70d13150ca2c3370fd40a9ea8267093ffd8b4938e9e2762e4' 
  AND token = 'Onlzaw9DCTM80gcqKdnLAz/wab7BATg9tbE9/otbl9k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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