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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'be95cdfe858ec0d63a09c2a8154e10ac623e45d8e40e506d953b56e5c36f49ca' 
  AND token = '5RIBVK56R1nkOvLFPifcRZshDF0In147E0hjXfesMes=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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