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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ecc8125961a222f2c0bedca7bd6ce73a019cfb44dc529428724135a0c38d93b0' 
  AND token = '7rIMJK29epRl0370oeLKUJmx960H8ygQX5OxodoVgpY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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