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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b7932ddee427f2b86418f171ba848a54165f20aaccafd67e2bf1320e7b8244e6' 
  AND token = 'iA67nXH4SRLff92kper7IyfGLWJCOdLIZkQPmOYSJ6o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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