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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d3af9414bf97ef73950dd78787fe69a21a0b983afb2d6b8e12e1f91eeb96a4f' 
  AND token = 'yaIB9hoPu6gJyA/jv4Fsm3dnBMuHGtXe4CnzerH4+O8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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