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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9d3b8f50f12c28f072e66e90824ba209b617e7567e50da674e1fe197753bdf75' 
  AND token = '2Z4dBZ2nQfRgHR083OPD1vakSWk0PohEN6h4i8UeWfw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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