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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '155d0a4c2867668f51f385083f2a535ef4a2db599f95a6e1c7f05ffdadd82013' 
  AND token = '45o14jp1QnOH2p5dt2jWLUtiutlkV5A1ZLp4Heq5f/8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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