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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '28533623ffeb7bc9c241378edfaff24bc296c045a8388a50ee8c55d862a53a88' 
  AND token = 'iPPO6lNLEWUJV5jr6RJt7rUq43cw2VQISHD0gyukcBk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00077

JSON explain

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