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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c5bad967fd4c4b4a501c386f866e72fba4b1c80df5221128ea249eaf51e21d41' 
  AND token = 'HcGuX3SRddyf5291VklSLxR0BcPsrj5FNNKyB2AObQY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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