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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ac30ec9a1ff53dec3b43f155b78ca018cd015ca7043195d1b57dffd1e818782f' 
  AND token = '/QXeoN4EBjJP55c0s7R+yj3M/p06uueH+B7GCAb3ViA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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