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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '44d1fc603b031080d8d4c064d2a7ca967a886e3e63cc6b85749b734d2f45feda' 
  AND token = 'ljPOJAc5ixxbFUuTts5I+RPiu/Q3sUhp+CCF8pzPneQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00059

JSON explain

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