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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '00bb47c9eacfbc0672a1bd7c481bdbaede1c85b115beccf3f1bdb9a77b186a5c' 
  AND token = 'SGVYKCD/HlivOa5oEhU3k7RGB20I33xAt67dckDwulw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00302

JSON explain

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