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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3a498f4174d28ec6f937cf6e3b5943277dc19fdac2dc790c2659940c6329601f' 
  AND token = 'CRd5fOMvd9wzs71SVVQw/4UpRess2HMUPp6zxlxaSIM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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