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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02781a1309066822ebeee4b330d4e8f2b0169d81623fe327807d5c0e6905536b' 
  AND token = 'bpdWS1e8pF1POxDHR+UE0vpxKia6XgW+H1gTytQm/wo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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