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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4b314999c9c993e010629b898040e6c61ec956c3c2f4fc8aaaf8646e1119d132' 
  AND token = '+WwfF1jIQV3CLSw+1bsCpP7qik9AiEzBw2K3KUc5ipw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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