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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e2080e88aafe938b5da957fb9f202e63e4e7343cdee098e8acfb515c0bf5ddd3' 
  AND token = 'ovb2Fq+k2W1I3PKf+NBplGS/NGkCM/caZwvvoH8SYxI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00114

JSON explain

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