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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cbab45422dafbc9105f52eb5be8bea28e33ca5f9854b2b76e0b1dc6c4d2b9eb9' 
  AND token = 'kFbeGXH74wuS4IywV1F7NKQ6Eo4FyvtBfQOpq6Gj3aQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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