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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '33b89f4ae7d23a735fd742c68918cf9ffb5d3f3f0b16a2e06cd118e2eae0d28b' 
  AND token = 'ybYU9d2iV2hqDwq1eDtbvYs9hbcr8M+xxM6ejVOp+LQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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