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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bcbf1237037cda6a48bcdbd349da6e51bd6a5a5981088534359ae82a1968ded9' 
  AND token = 'GAP+vvotetcynGngdpLYiY8jpseRKXK9q96teYuhXyA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00066

JSON explain

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