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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bae364433b562822dbc058b209a0c0167345c2109147084270b36a8093286ca0' 
  AND token = 'aboxD4LarC5atFLYVilwW7y1qsgcY/S+dohWukoi45U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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