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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ed1db482d3e14ce5e7f16195b5f4adac56936984ac844136c33e3b4ffad7bf70' 
  AND token = 'wT5J53J1G4X+trkwDjnBSBOeZlXMp0PPgl3fm4luguA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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