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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b5824127c2da1c1c060e688f714461f94832b6cfa7916e80e1bb2788a59584ce' 
  AND token = '7+IMX0aWRsk5YxmP0QJoct+EbGGa685QSNeVU+i7pfc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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