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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0ffd80b31e3733109056d54acb638f058dba12fa7c99e1e39d5dc8b1ff1b1d25' 
  AND token = '3V+Y9z1oDv1RL7OySq8u47v1bcqsspikhDTCNeeZHOE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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