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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1bb24227149eb3aa8e9e33825242b83e1a701e8bee40ec5bcf46bd5b425bf44b' 
  AND token = 'SxITE391q1iJsOpW6wrB6EAgiptdPdFQ53wJBCwlyMI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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