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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0cd627ba395c08508d945c6849721dbfb160f5182a39cc72c54ba6ea393d1cc8' 
  AND token = 'lGWjuWXVxjl51kpsQKu5W/96Sz707nknmSBaWQkxAHs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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