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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0b7dc2dae3bc42369ccd2911883fcfb062c9901356b2fb1dc6e4de30821bcad1' 
  AND token = 'YOogzjrTlvowyGRlHvUG64obIxSt5swq09v9xaFVurE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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