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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '322fb45b8e3c1c2a004ccbd4525aa34cb0d01301ddb2bc54d75f7ca44837d318' 
  AND token = 'Le1noxUV128NtwiHSd/1Qai2k7vYFVoa9xYIrtQHnRs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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