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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '59644d1d6191a9440839b1915f0b5308f99d3a92955a8a9d4a14de68ba845c3c' 
  AND token = 'lKAlJskLVgCuTO7vSDH36WX9GSi3yIdG3DXHETR1eGY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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