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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ae734b95ae37dfa58d9f2407e7af20fccbc8a8ca120d6046e49247ec2c099a4f' 
  AND token = 'WFVgGVaeX0OG3oc43KiHrX09vQqd2z7Oa6DOZXs/WVU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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