SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bc13e78148b7cf64445bc73773e1df024f97f6a19fa594cfcf93539a60ed2db5' 
  AND token = 'lecrPt++xE0RiM/Qk5rYGvjdlSpsopXhpLFw2Uroczc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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