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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd500db717235378c7f31521d792fbf01df15dd6c50b0a3f2129e14d2b85acd04' 
  AND token = 'RvsrYHlLcCGppedKk2W1Hve8y/wJnq1WIg3L4S0FyE0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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