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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ab5e9142eb5fa14217aa367da882213476897bf89156d8c5a2cb50b4bb53589' 
  AND token = '8uNX9C/p+nT0YkRgB9U1LXC74ErLJXZUflppY3eS2E0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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