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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cd02d526beb857b305a3a4b55eb99fc60ead82b43f5c023cfdcb8fa33f95b2df' 
  AND token = 'Mvga6L3X7++qRfmZJBEfjrQr4zGMfD6GkMHT4iiVa/k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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