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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1884790c2b0251c73c784448837a2e25adcfc4ce77fbf10d78f89bd135f1957d' 
  AND token = '4yP7mDk4/peikvrBmvqV1g6ErcAsmzVhxuZzbNm/e2c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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