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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ab9026795e8874baced818302cea9afcc8a1985f056e07d28aa5224dce639ce0' 
  AND token = 'I2XGW/k9IrElZ1kzJVsNf3E1jRCzb1Lc7WU4hUuwF5o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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