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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2197b4c8a1472f2fb7f86ba5b7ba6b0d02ab7620b39a4d835ac588d56a3bfaea' 
  AND token = 'NXHXOrRn2H7XvS/agV78/khh4XfIEeXkZXgSs51bWM4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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