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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '183317dda29e0907111ee63cc3eb64dfda02aa1cab75a7848fe420616905ca80' 
  AND token = 'yi45j7wx10ZfXIb3AmL5ZCEpHzujSFZ7JXdXG8qwCKk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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